S
M
T
W
T
F
S
30
70°
49°
31
70°
48°
1
71°
51°
2
71°
56°
3
72°
58°
4
78°
58°
5
79°
57°
6
78°
49°
7
76°
48°
8
70°
48°
9
71°
47°
10
69°
50°
11
69°
52°
12
67°
48°
13
72°
51°
14
74°
54°
15
74°
52°
16
68°
53°
17
67°
52°
18
70°
51°
19
72°
45°
20
68°
47°
21
69°
44°
22
71°
43°
23
64°
43°
24
64°
44°
25
63°
46°
26
63°
42°
27
64°
42°
28
62°
44°
29
60°
40°
30
61°
40°
1
61°
45°
2
67°
40°
3
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greenville
Greenville's September 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 40° and 58°. The average high for September is 69° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Greenville. See also: October | November | December.
